Loom shuttle



Junelz, 1945. l J, B. DAUDELIN Em 2,377,925 LOOM SHUTTLE l Filed April 15, 1944 Patented June 12, 1945 LOOM SHUTTLE `lean B. Daudelin, Fall River, Mass.,` and Rudolph J. Messier, East Providence, R. I., assignors to Daudelin and Messier Company, Incorporated, East Providence, R. I., a. corporation of Rhode Island Application April 13, 1944, Serial No. 530,820

Claims.

This invention relates to shuttles of the type designed more particularly for use in automatic weft replenishing looms.

In such looms the bobbin is ejected from the running shuttle when the supply of iilling on the former becomes depleted and a full bobbin is forced into the shuttle` as the latter is boxed at one end of its flight. Immediately after this operation has been completed, the shuttle starts on its next flight through the shed, and during this flight and at the beginning of the next one, the shuttle must automatically thread itself. The present invention aims to devise a threading device for performing this function with a high degreey of certainty.

In our earlier Patent No. 2,333,413 we have shown, described and claimed a shuttle threading means which has proved very satisfactory in service. In this construction, however, some of the parts that engage and guide the thread both during the threading operation and also thereafter, are made of wire, and it has happened that the operators in the mills where these shuttles were in use have bent these wire parts apparently for experimental purposes of theirown. The result practically always has been to put the threading device out of commission. It is one of the objects of this invention, therefore, to devise a shuttle threading device having the operating advantages of the construction shown in said patent, but in which this temptation to change the l adjustmentl or relationship of the parts and the opportunity for doing so will be eliminated.

Whi1e, as above stated, the device shown incur earlier patent has proven in practice to be very satisfactory, nevertheless experiments made for the deliberate purpose of developing misthreading or unthreading have indicated that this result might occurjunder some conditions rather rarely met in practice. Therefore, a further object of this invention has been t0 improve and perfect the construction shown in our patent above identied with a view to making it even more secure against the possibility of misthreading or unthreading.

In the shuttle shown in said patent there is a tendency furthe lint and fly t0 collect in the threading slot where it may interfere with the automatic threading-up action. This is common in automatic or self-threading shuttles. It is one of thev objects of this invention, however, to devise a construction in which this tendency will be minimized, and in which, if such an accumulation does occur, it can be very easily and quickly removed. i

`with a metal tip 3.

'Ihe nature of the invention Will be readily understood from the following description when read in connection with the accompanying drawing, and the novel features will be particularly pointed out in the appended claims.

In the drawing,

Fig. 1 is a plan view of one end portion of a.

shuttle equipped with a threading device embodying features of this invention;

Fig. 2 is a side elevation of the parts shown in Fig. l;

Figs. 3 and 4 are transverse, sectional views through the shuttle taken substantially on the lines 3--3 endl-4, respectively, Fig'. 1;

Fig. 5 is a` front end view of the threading device per se;

Fig. 6 is va plan view of the two sections of the threading device when laid open; and

Fig. '7 is an angular view of the rearward end portionA of one of the parts or sections of the threading device.

Referring rstto Figs. 1 and 2, the forward end of a shuttle body is there shown at 2, this body customarily being made of wood and equipped In this body is a bobbin chamber 4 for thereception of the usual filling bobbin 5. Also, as is customary in these shuttles, the body is provided with a diagonal slot 6 for guiding the yarn during the threading up operation into a laterally disposed delivery eye 'l in vwhich a yarn guiding device 8 is mounted. As

shown, this device is of a common pigtail variety.

The threading device provided by this invention comprises right and left blocks indicated at A and B, respectively. These are made of any rigid and preferably non-corrosive material, such as brass, aluminum alloys, plastics, or the like. In side elevation they are roughly of rectangular form and each is provided with a flat vertical outer surface, as shown in Figs..3, 4 and 5, a flat lower edge, and also .with a longitudinal outer shoulder near its upper edge, as shown at a and b in Fig. 4, to rest on complemental shoulders provided at the upper edge of the slot c formed in the shuttle body at the forward end ofthe bobbin chamber to receive the threading device.

Theinner lateral surfaces of these two blocks are provided with parts fitting one within the other, the fit between certain of these parts being suiciently tight to position them properly with reference to each other, but the surfaces of other parts are spaced so as to cooperate in providing a tortuous, approximately vertical threadingr slot between them for the passage downwardly of the yarn into its running position in the device. As

best shown in Figs. and 6, this shaping of the inner surfaces of the two blocks includes the formation of a curved channel e, Fig. 5, in the block A, the rib d of block B tting snugly in this channel for a considerable part of the length of the device.

Also, this block-'A is provided r` withi-adongitudi-l nal upper edge g extending for practically its entire length, except where interrupted by the notch and terminating at its forward end in a nose f From this nose piece the outer. and.

piece I Il; lower surfaces slope backwardly and downwardly into a diagonal slot II, Fig.' 6, Jwhich.1 leads into an opening I2 that registers withzthe -delivery eye;v

1. The slot Il also registerswiththe-slot-"Bin the shuttle.

The other block B is provided with a groove I3 extending its entire length inpwhich thefedge 9 of the block A is positioned when the parts are assembled, as shown in Figs. 3, 4 and 5, but the extreme upper edge I4 of .the blockB overlies and projects laterally beyond the upperedgeS onthe block A for aconsiderableidistance.. as williY be evident from an inspection of said igures. Block A 'also preferably includes .a lateral extensionA I 5, Figs. 1, 2 and 5, Which'is set into .the.shuttle. just above the forward section of the diagonal threading slots 6 and takes theplace of. the -woodnormally occupying this position.- Thisfextension.

may or may not be used,]asdesiredgvbutwe ,con-

sider it preferable because it replaces a section.

of, wood that is somewhat weakened by the very nature of itsfshape., Whenthispart I5 is used,. its lower .surfaceforms apart of-.the ,upper wall.'

scribed.'.is' to provide. the tortuous threading i slot above referredto. between the, two blocks and to form what, in' effect, is anapproximately circular guiding eye in line with'the bobbinaxis and consisting of portions of the surfaces of the groovesV I6 and 20. The latter ismade in therearedge of the block A, as shown in,Figs..3 and This device is securedin place .by two bolts A2t and 22 which pass through holes formed inthe parts A rand B to receive them, and both ,the heads and theA nuts-of these bolts. are-embedded in the wood of the shuttle body. Aholer ,23, Fig.

7, also is formed [in the-part B*to receive the shank of the guide 8 andother holes are .provided to receive an upright pin, 24, Fig.v 4,',and a horizontal pin 25, the latter 4being po-sitionedbehind the. former and -thetwo cooperatingtol guide the,

yarn in its runningposition. The horizontalpin 25 is positioned close to the` guardor hornIL im. f

mediatelyin front of .it, so that these two parts determine very .accurately the position of vthe thread at the rear, endvof the device. These pins preferably have either vitreous or. highly polished surfaces so .that they offer very little resistance to' the travel of. the yarn.

When the shuttle isA inactualuseand the bob.-A bin .change has just. been. made,.the,end.of..tl1e

yarn fromthe new bobbin,is.anchoredinapartA of i the magazine sov that whenthefshuttle .2, ,1,

starts on its iilght toward the left, the yarn running from the bobbin is guided approximately along the edge I4 and the groove 2B formed in the shuttle body. This groove registers with the upper edge of the threading slot in the threading device, and in order to guide the yarn more effectively intdthis slotythe upper rearward surfaces ,of the blocks are bevelledtoform a V- shaped guide at the intake or receiving end of the device, as clearly illustrated in Fig. 1. Note that the edges 9 and I4 lie approximately in the vertical plane of the bobbin axis which also runs through:y the shuttle -tip 3. The tension on the yarnasitunwindsfrom the bobbin 5 draws it `downathrough'thetortuous threading slot above referredto, theyarn passing around the edge I4,

Figs. 3 and 5,y during this movement and then4 beinggdeflected vtoward the left (Fig. 3) around the edge 9 and an instant later around the guard I 1; As 1will be evident from an inspection of Figs. 3 and 6, this guard or .hornlies immediatelyin front of the flange 20'; 6,`so that .the yam must make a fairly sharp bend as tl'slidesaround, the horn and into .the eye Iliof ithe. threading slot. 'I'he .lowersurface ofthe lip,l8 lies in,.con tact with a surface .of complemental shape onthe part A, as showninFig. 6'at.I8"' so that Athe. thread cannot get around it.'

The 'foregoing operations take-place duringthe rst: flight of theshuttle, but when .it-startson its returnflight the yarn passes under the nose I0,Figs. 1 and 6, of.the.part A; slidesbackwardly, and downwardly through'the slot I I and the4 regs, istering slot 6; Figs. 1 'and 2,in.the shuttle body', and subsequently slips over the hump inthe guide 8 and into .the .delivery eye A'L At this. time the ,threadiiig-operation-hasbeen completed. and 'L thereafter. the, yarn.Y travels;

through the eye It;4 runsover .thefpin25. Fig..4;.

makes. a right-angle turn around .the pin. 24 and j runs out through the. delivery eye .1.1

Thereis always some ballooningf the yarn,

as. it; passesy over. the tip rof f 'the bobbin, and. this f is true whether thewindisrightrhand or...le'ftf hand: Inathis arrangement, however, anyftendf. ency'of 'such' a. ball'o'on .to run ,.out.'througlL the.-

threading device. is` .effectually prevented by the. cooperative relationship, ofthe flange 20'. and its.: relationY tor the curved 'part 2U, Figs..,3 and-.'6-of..

the eye, and particularlyto the guard I1 and.lip.

I8, .Figs. 3Sand '7. Boththe-latterlie as close toV that this space is overlapped immediately. behind..

these membersv by the ange20`. Consequently, it is an extremely diiiicultmatter for. a balloon. formed in the thread, once `the latterv hasarrived` in its running positiony to escape .these cooperat-v ing parts I'II8 and 20.

There is also a tendency for a shuttle. tolrnise-y thread or unthread, dueto looping .out when. it

starts backwardly. in.a direction towardthe maga azin'e end of the lloom,.but that. is .preventedin this construction by the overlapof. the edge. I4... of thev block'Bl over the edge Y9.of. the blockA;l

the. further fact that the-nose piece. l0,.-Figs.. 5 and 6,v of. -the -`latter Alies-.under .the vforward .end

of the. ilange I4,.Fig.- 1wherethe latteris curved: down to guide the. yarn into-the threza.dingrslei'.,r and also by the fact that this nose piece liesrbefhind the wood at the left-hand side of the groove 26. The latter is undercut, as shownat 9Figs. 1 and 2, to provide ample space for the yarn'lto go into` the threading slot, but it is practically' impossible for a loop moving backward not to be deflected by the nose piece I into the slot 6.

`The yarn guiding edges 9 'and I4 of the blocks A and B, respectively, are notched, as illustrated at f and f', Fig. 1, and they cooperate to form a slot which opens directly into an enlargement inthe threading groove between the two parts A and B. This slot opens into the region where lint and fly tends to collect, and it is a simple `matter,` therefore, to inspectthe threading device for such an accumulation, such inspection merely involving looking into the slot. If a deposit of lint and y is found there it can often be expelled, merely by blowing into the slot, but, in any event', it can be picked out with a hook, such as a crochet hook. The internal walls of both parts A and 2B in theregion under the slot f-f are madesubstantially parallel, upright and smooth to 'facilitate this operation, and they are so dimensioned as to provide an intermediate chamber of substantial size through which the yarn travels from the eye IB up to a point under the nose piece I0 during the threading operation. Later, after the shuttle has threadedup, the yarn also travels through the rearward end of this chamber in passing around the post or pin 24.

When the bobbin is changed in the shuttle, and during the initial flight of the shuttle through the shed after that change has taken place, it sometimes happens that two or three turns of yarn will sluif oif the bobbin 5 simultaneously, thus producing a loop in the yarn which may prevent the device threading up properly because this action occurs while the yarn is still running through the groove I3. Such an occur rence is practically certain to prevent the ordinary threading device from functioning properly, and will produce a mispick on the return flight of the shuttle because of this fact.

In order to avoid this result a hook 26', Fig. 6,

is formed at the forward end of the notch f in the block A where it lies directly under the iiange of the part B at the forward end of. the notch f', as shown in Fig. 1. This hook is positioned where it will catch an outward running loop formed in some such manner as that just described and, as a rule, will cause it to ravel itself out so that the threading operation will be completed in a normal manner.

The two parts A and B of the threading device have been illustrated as separate units. At present they are manufactured in this manner, and while they can be installed in the shuttle separately, as above described, and the device so assembled will work entirely satisfactorily, still we consider it preferable to weld, braze, solder, or otherwise secure these two parts together before the device is inserted in the shuttle. In such a construction the parts are permanently united, and

.it is practically impossible for an operator to obtain sufcient access to any of these parts inside the device to move them out of ttheir proper relationship, one to another, without completely wrecking the article. Also, with the members so disposed, there is much less temptation for an inquisitive workman to experiment with those parts inside the device. These elements A and B may be made by the ordinary casting operation or by die casting, the latter method, of course, being preferred.

This construction is exceptionally sturdy and -substantial, can be easily installed, 'and when be evident that the invention is not limited to embodiment in the precise Vform shown.

This application is a continuation-in-part oiA our earlier application Ser. No. 502,408, filed `September 15, 1943.

Having thus described our invention, desire to claim as new is:

1. A threading device for a loom 'shuttle having a lateral delivery eye, comprising right and left blocks having inner lateral opposed faces with parts fitting one within the other and other parts spaced apart "to provide a tortuous threading slot between them for the downward passage of a thread into running position,l one of said blocks having a longitudinal upper edge extending lengthwise of said slot and projecting laterally tow-ard the second block, the latter block having a long groove in its inner face near the upper edge thereof into which said edge of the" iirst block projects so that the upper edge of the second block overlies said projecting edge of the first block from substantially its forward end backwardly, the forward end of said underlying edge terminating in. a nose piece having front and lower surfaces extending diagonally downwardly and backwardly and forming the upper wall of a slot provided in the first block and running to an aperture in the wall of said first block adapted to register with said delivery eye, said blocks having parts fitting one within the other in front of said slot to register the two blocks, one with the other.

2. A threading device for a loom shuttle having a lateral delivery eye, comprising right and left blocks having inner lateral opposed faces with parts tting one within the other and other parts spaced apart to provide a tortuous threading slot between them for the downward passage of a thread into running position, one of said blocks having a longitudinal upper edge extending lengthwise of said slot and projecting laterally toward the second block, the latter block having a long groove in its inner face near the upper edge thereof into which said edge of the iirst block projects so that the upper edge of the second block overlies said projecting edge of the first block from substantially its forward end backwardly, the forward end of said underlying edge terminating in a nose piece, the rear ends of both of said blocks having grooved surfaces forming parts of said inner faces and so opposed that, together, they form a guiding eye for the incoming yarn as it enters the threading device, said overlapped upper edges of both blocks having notches formed in them, opposed to each other and cooperating to provide an aperture opening into said threading slot, whereby lint collected in the latter slot may be removed through said aperture.

3. A threading device according to preceding claim 2, in which the inner opposed lateral faces of said blocks are shaped to provide an enlargement of the threading slot immediately below said aperture and into which the latter opens.

4. A threading device for a loom shuttle comprising right and left blocks having inner lateral opposed surfaces', certain parts of which are spaced to provide a threading slot between them what we' thi'eadninto y'runningposition'. the rear. end .por-vv tion of one oisaidblocks. having-alaterallyextending; .enlargement withI a .-.hole formed; therethrough; thehole extending .-:lengthwise-.foi the slotv and its walls. completely',encirclinggthe hole except for a narrow slotatthe side thereof adjae cent' to the other block, ,the Vlatterf'blockbeing recessed .to freceivewsaid:.enlargement and .-providing i a space through which ai thread: can. slide downwardly throughthe latter slot andA into said,

hole,l said second. block@ also. L having fa 'iiange' at its rearward end, -locatedloehind said.holein. the rst block, and overlapping said hole, ,and said flange having f a.:- currved'notohl. formed.l therein overlapping the slot in said-'enlargement androoperatng with the walls. of. saidihole to'form.- a thread guiding eye g atfthe rearward end .-.ofv the block.

5. Al'loom shuttle provided with arbobbin chambei', a thread delivery eye at one side of the shuttle and a socket attheforward .endof said-chamber andat one side of said eye,A incomloination` with a threading device positioned inrsaidisocket and comprising rightand left .blocks havingA inner lateral opposed faces withpartscf, onetting in the other to relatively position: the two.and also havingother parts t spaced.. apart to provide a tortuousthreading slot between: themfboth. ofv

said :blocks having. longitudinally extendingmppen edges located approxdmately'in; the verticalzplane ofthefaxis offl'axbobbininlsaid chamber,y onez'ol'.: said blocks yhaving a .groove .inv4 its 4inner surfaceA into. which'said'upper: .edge of the seccndblock extendsA yso .that lone of, said edges overlies` f the other, a space being provided aroundsaid-unde'rlying edge for the passage ofthe threadaaround said edge and downzinto the threading'slot,zsaid:

block, said shuttle having afdiagonalfslotleading' from a region -justfunder the/endet` saidcnose' piece to said delivery' eye and having lagroove extending forward from the upper end iofl said threading slot toward the front'tipend offthe-E shuttle, the main portion ofthe-.wall of the latter.

groove being in line with said upper edgesotthe' threading device but said Wall-being -undercutat and adjacentto said nose piece to .provide-another guiding surface for thenthread.approximatelydnz line with the underlyingedge ofv saidthreading device.

JEAN. B.V DAUDELIN- RUDOLPH .J.4 MESSIER..I 

